Locomotive transmission system



a. M. mou. v LOCOMOTIVE TRANSMISSION SYSTEM.

'APPLICRTION HLEDSEPRII: Oll- WITNESSES: r INVENTOR George M. EaTon.

UNITED STATES PATENT OFFICE.

GEORGE M. EATON, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSEELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

LOOOMOTIVE TRANSMISSION SYSTEM.

Specification of Letters Patent.

Patented Jan. 27, 1920.

Application filed September 2'? 1916. Serial No. 122,393.

To all whom it may concern:

Be it known that I, (inonen M. EATON, a citizen of the United States,and a resident of Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement in LocomotiveTransmission Systems, of which the following is a specification.

My invention relates to locomotives and particularly to the drivingconnections between the propelling motors and the driving wheels.

One object of my invention is to provide a locomotive having a highcenter of gravity. a driving connection between the propelling motor andthe driving wheels which shall provide a bearing on each side of thegear wheels contained therein, and which shall permit each truck to havea relatively short wheel base.

Another object of my invention is to provide a locomotive of the aboveindicated character that shall be provided with a driving connectionbetween the motors and the various driving wheels, which shall obviateto a material degree the trouble resulting from the changes of center ofthe jack shaft in its bearings, which are chiefly caused by theconnecting rod stresses applied on the bearings.

A further object of my invention is to provide a locomotive having adriving connec tion of the above indicated character which shall belocated in the vertical central plantof the locomotive and which shallresiliently transmit the driving effort of the motors to the variousdriving wheels.

More specifically, my invention comprises a locomotive having a numberof trucks, each embodying two axles having driving wheels mountedthereon, and side frames mounted on said axles. A motor, comprising aframe, two armature shafts and four armatures, is mounted on said sideframes. A pinion is mounted centrally on each armature shaft, a bearingis located on each side of the pinion and an armature is disposedadjacent to each end of each shaft. A jack shaft having a gear wheelmeshing with the motor pinions is suspended from the motor frame bymeans comprising bearings, one bearing being disposed on each side ofsaid jack-shaft gear wheel. Between each of said axles and thejack-shaft gear wheel is disposed a flexible connection com- Zontalline,

prising a spider mounted on the axle midway between the driving Wheelsand two quill members which surround the spider and which have teethmeshing with the teeth on said jack-shaft gear wheel. The quill membersare supported by projections extend ing from the motor frame and arejoined to the spider by a resilient means.

In the accompanying drawing, Figure 1 is a partial view of a locomotiveconstructed in accordance with my invention; Figs. 2 and 3 are partialsectional views along the lines AA and BB, of the locomotive illustratedin Fig. 1; and Fig. 4 is a detail view of the motors illustrated in Fig.1.

Referring to the accompanying drawing and particularly to Fig. 1, alocomotive 1 is illustrated. comprising a body portion 2. outer trucks3, one only of which is illustrated, guiding trucks 4 which are pivotedto the outer trucks 3 and one only of which is illustrated, and innertrucks 5. The inner and outer trucks 5 and 3 are connected together bymeans of the articulated connections 6, and the cab or body portion 2 isconneoted to the inner trucks 5 by means of the pivotal connections 7.

As the inner and outer trucks 5 and 3 are substantially similar inconstruction, one truck only will be described in detail, namely truck3. The outer truck 3 comprises two axles 8 having driving wheels 9mounted thereon, side frames 10 which are supported on the axles 8, anda twin motor 11 which is bolted to the side frames 10. A jack shaft 12having a gear wheel 13 rigidly mounted thereon, is supported on theframe 14 of the motor 11.

The twin motors 11 embody armature shafts 15, each of which has a pinion16 mounted thereon midway'between the ends thereof and between bearings17. Adjacent to the bearings 17 near the ends of the shaft 15 armatures18 are mounted. Two arms 19 project vertically downward from the motorframe 14 and are adapted to support the jack shaft 12 by means ofbearings 20. The bearings 20 are preferably split on a horiasillustrated in Fig. 1 of the drawing, and embody caps 21 and bearingbrasses 22. When the jack shaft; 12 [is mounted in position on the arms19 projecting from the motor frame 12 the'gear wheel 13 mounted thereonme with the two pinions 16 of the meter 1 1E I:

Resilient driving connections 23 are proricged between the jack-shaftgear wheel 13 an each of the axles 8. Each resilient driving connectionembodies a spider 2 4 rigidly mounted on the axle 8 and two uill mom--bers 25 having teeth 26 which mes 1 with the te E; of he ck-shaft gearwheel. The qui mem ers 5 and the spider 2e are resiliently connectedtogether by means of s rings 27 in a manner described in my latt No.9375991 issued October 19, 1909. The quill members 25 are supported fromthe motor frame 14 by means of arms 28 111 a manner similar to thesupporting of the jack shaft 12 by means of the arms 19. The quillmembers 25 are supported on hearings in the arms 28, which are similarto the bearings for the jack shaft 12. Care must be exercised, however,to maintain clearance between the axle 8 and the quill members 25. Thebearings for the quill members are split along a horizontal line asindicated in Fig. 1 of the drawing and are provided with hearing brassesQ9.

F mm the above description it may be noted that each truck of thelocomotive is provided with a resilient driving connection between thepropelling motor and the axles thereof, which is located in a verticalcen tral plane of the locomotive and that each gear wheel associatedwith the driving connection has a bearing on each side thereof.

I do not wish to be restricted to the specific construction orarrangement of parts herein set forth, as various modification's thereofmay be effected Without departing from the spirit and scope of myinventicn, I desire, therefore, that onl such limitations shall beimposed as are in icated in the appended claims.

I claim as my invention 1. In an electric vehicle, two axles havingdriving wheels mounted thereon, a 'ack shaft disposed between said axlesand avin agear Wheel mounted thereon, two yieldalile niving connectionsmeshing with said gear wheel, the driving connections being connected tosaid axles and the gear wheel on said jack 'shait, and means foroperating the. gear wheel mounted on said jack shaft to; epenatc thedriving wheels.

8. In an electric vehicle, two axles having driving wheels mountedthereon, a jack shailit disposed between said axles and having a gearwheel mounted thereon and disposed in the central vertical plane of thevehicle, two. yioldable drivin connections meshing with said get? wheeand respectlvely mounted on said axles, said driving connectionsconnected to said axl In a plane midway between the driving wheels, andmeans tor; c retmg the gear wheelmmtcdscn the] shatt to operate 5, Insome salads, the

with two driving axles having driving wheels mounted thereon, and aresilient driving connection attached to each axle midway between thedrivng wheels, of a jack shaft disposed between said axles, a gear wheelmounted on said jack shaft and meshing with said driving connections,and means in mesh with the jack-shaft gear Wheel for rotating the same.

4. In an electric vehicle, the combination with two axles having drivingwheels mounted thereon, and a resilient driving connection associatedwith each of said axles, of a jack shaft disposed between said axles,and a gear wheel on said jack shaft meshing with said resilient drivingconnections.

5. In an electric vehicle, the combination with two axles having drivingWheels mounted thereon, a driving connection as sociated with each ofsaid axles, and a jack shaft disposed between said axles and having agear wheel mounted thereon, said jack-shaft gear wheel meshing with saiddriving connections, of a motor for operating the jack shaft gear wheeland comprising two armature shafts, pinions mounted on each of saidarmature shafts near the center thereof and overhung armaturos disposednear the end of the shafts.

6. In an electric locomotive, the combination with two axles havingdriving wheels mounted thereon, and a jack shaft disposed between saidaxles, of a motor, and a set of gear wheels tor connecting said motor tothe jack shaft and the driving axles, each of said gear wheels beingdisposed in the central vertical plane of the locomotive betweensupporting bearings.

7. In an electric locomotive, the combination with an axle havingdriving wheels mounted thereon, and a propelling motor, of meanscomprising a flexible connection for transmitting the driving effort ofthe motor to the driving wheels, said flexible connection being disposedin the central vertical plane of the locomotive.

8. In a locomotive, the combination with :fair of axles having drivingwheels mountthereon, side frames mounted on said axles, a motor havingthe frame thereof mounted on said side frames, a jack shaft disposedbetween said axles and having a gear wheel mounted thereon, a hearin forsaid jack shaft disposed on each si e of said Jack-shaft gear wheel,said bearings being supported by the motor frame, of resilient means fortransmihtin the driving elfort of said motor through said jack-shaftgear wheel and said axles to the driving wheels.

9, In an electric locomotive, the combineticn with two axles havingdriving wheels mounted thereon, and a jack shaft dis osed between andsales, at i meteo s s t gear ing a flexible drive wheels for connectingsaid motor to the jack shaft and the driving axles, and bearingsdisposed on both sides of each of said gear wheels, all of said gearwheels being dis osed in the central vertical plane of the ocomotive.

10. In an electric locomotive, the combination with an axle havingdriving wheels and side frames mounted thereon, and an electric motormounted on said side frames, of means for transmittin the drivin effortof the motor to the riving whee s, said means comprising a flexibledrive disposed midway between said driving wheels, said flexible drivecomprising a spider mounted on said axle and two uill memberssurrounding the spider, an means for su porting said quill member fromsaid motor rame 11. In an electric locomotive, the combination with anaxle having driving wheels mounted thereon, and a propelling motorhaving a supporting frame, of means for transmitting the driving effortof said motor to the driving wheels, said means compriscomposed of aspider mounted on said axle midway between the driving wheel and twoquill members sur rounding the spider, and means for supporting thequill members from said motor frame adjacent to said spider.

12. In a locomotive, the combination with a pair of axles having drivingwheels mounted thereon, a jack shaft disposed between said axles, amotor having a frame means projecting from said motor,frame forsupporting said jack shaft, a gear wheel mounted on said jack shaft, andpinions for transmitting the driving efi'ort of said motor to saidjack-shaft gear wheel, of a flexible drive associated with each of saidaxles and adapted to transmit the driving effort of the motors from thejack-shaft gear wheel to the driving wheels, each of said flexibledrives comprising a spider attached to the shaft and quill memberssupported by said motor.

In an electric locomotive, the combination with a pair of driving axleshaving driving wheels mounted thereon, of propelling means comprising aair of para lel armature shafts, an armature at each end of each of saidshafts, bearings for sup armature shaft at two places etween thearmatures thereon, a pinion on each armature shaft between its bearingsupports, a jack shaft between the driving axles and below the ropellingmeans, a gear on said jack sha meshing with the two pinions on saidarmature shafts, and gearin connecting said jack-shaft gear to saidriving axles, all of said gearing between said propelling means andaxles being located in the central vertical plane of the locomotive.

In testimony whereof I have hereunto subscribed my name this 25th day ofSept,

GEORGE M. EATON.

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